18948557841 has 16 divisors (see below), whose sum is σ = 25349944704. Its totient is φ = 12589841664.

The previous prime is 18948557839. The next prime is 18948557869. The reversal of 18948557841 is 14875584981.

It is not a de Polignac number, because 18948557841 - 2¹ = 18948557839 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18948557041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1156281 + ... + 1172553.

It is an arithmetic number, because the mean of its divisors is an integer number (1584371544).

Almost surely, 2^18948557841 is an apocalyptic number.

It is an amenable number.

18948557841 is a deficient number, since it is larger than the sum of its proper divisors (6401386863).

18948557841 is a wasteful number, since it uses less digits than its factorization.

18948557841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17560.

The product of its digits is 12902400, while the sum is 60.

The spelling of 18948557841 in words is "eighteen billion, nine hundred forty-eight million, five hundred fifty-seven thousand, eight hundred forty-one".